Caption: Caryophyllene. Molecular model of the sesquiterpene caryophyllene (C15.H24). This bicyclic molecule is a constituent of many essential oils found in plants such as cannabis, cloves, rosemary and hops. It is also found in, and contributes to the spiciness of, black pepper. Atoms are represented as spheres and are colour-coded: carbon (grey) and hydrogen (white). Illustration.